diff options
Diffstat (limited to 'isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/samplegrouping/CencSampleEncryptionInformationGroupEntry.java')
-rw-r--r-- | isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/samplegrouping/CencSampleEncryptionInformationGroupEntry.java | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/samplegrouping/CencSampleEncryptionInformationGroupEntry.java b/isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/samplegrouping/CencSampleEncryptionInformationGroupEntry.java new file mode 100644 index 0000000..b54f4d9 --- /dev/null +++ b/isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/samplegrouping/CencSampleEncryptionInformationGroupEntry.java @@ -0,0 +1,125 @@ +/* + * Copyright 2012 castLabs, Berlin + * + * Licensed under the Apache License, Version 2.0 (the License); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an AS IS BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.googlecode.mp4parser.boxes.mp4.samplegrouping; + +import com.coremedia.iso.Hex; +import com.coremedia.iso.IsoTypeReader; +import com.coremedia.iso.IsoTypeWriter; + +import java.nio.ByteBuffer; +import java.util.Arrays; + +/** + * Each sample in a protected track shall be associated with an IsEncrypted flag, IV_Size, and KID. + * This can be accomplished by (a) relying on the default values in the TrackEncryptionBox + * (see 8.2), or (b) specifying the parameters by sample group, or (c) using a combination of these two techniques. + * <p/> + * When specifying the parameters by sample group, the SampleToGroupBox in the sample table or track + * fragment specifies which samples use which sample group description from the SampleGroupDescriptionBox. + */ +public class CencSampleEncryptionInformationGroupEntry extends GroupEntry { + public static final String TYPE = "seig"; + + private int isEncrypted; + private byte ivSize; + private byte[] kid = new byte[16]; + + @Override + public void parse(ByteBuffer byteBuffer) { + isEncrypted = IsoTypeReader.readUInt24(byteBuffer); + ivSize = (byte) IsoTypeReader.readUInt8(byteBuffer); + kid = new byte[16]; + byteBuffer.get(kid); + + } + + @Override + public ByteBuffer get() { + ByteBuffer byteBuffer = ByteBuffer.allocate(20); + IsoTypeWriter.writeUInt24(byteBuffer, isEncrypted); + IsoTypeWriter.writeUInt8(byteBuffer, ivSize); + byteBuffer.put(kid); + byteBuffer.rewind(); + return byteBuffer; + } + + public int getEncrypted() { + return isEncrypted; + } + + public void setEncrypted(int encrypted) { + isEncrypted = encrypted; + } + + public byte getIvSize() { + return ivSize; + } + + public void setIvSize(byte ivSize) { + this.ivSize = ivSize; + } + + public byte[] getKid() { + return kid; + } + + public void setKid(byte[] kid) { + assert kid.length == 16; + this.kid = kid; + } + + @Override + public String toString() { + return "CencSampleEncryptionInformationGroupEntry{" + + "isEncrypted=" + isEncrypted + + ", ivSize=" + ivSize + + ", kid=" + Hex.encodeHex(kid) + + '}'; + } + + @Override + public boolean equals(Object o) { + if (this == o) { + return true; + } + if (o == null || getClass() != o.getClass()) { + return false; + } + + CencSampleEncryptionInformationGroupEntry that = (CencSampleEncryptionInformationGroupEntry) o; + + if (isEncrypted != that.isEncrypted) { + return false; + } + if (ivSize != that.ivSize) { + return false; + } + if (!Arrays.equals(kid, that.kid)) { + return false; + } + + return true; + } + + @Override + public int hashCode() { + int result = isEncrypted; + result = 31 * result + (int) ivSize; + result = 31 * result + (kid != null ? Arrays.hashCode(kid) : 0); + return result; + } +} |